Blog
Notes on signal, and building in the open.
Email engagement, follow-up strategy, and what we learn shipping MailSenseAI.
- ProductJune 6, 2026
Why we will never put a footer on your email
Every "free" email tracker pays for itself by advertising in your signature. We think that is a tax on your credibility — here is the model that lets us avoid it.
Read post 4 min - EngineeringMay 22, 2026
An open is not intent — introducing the signal model
Counting opens is easy and almost useless. We combine opens, clicks, and replies over 72 hours into a single read of whether a thread is actually warm.
Read post 7 min - DataMay 8, 2026
When to follow up: reading the 72-hour signal
The best time to follow up isn't 'the next morning' — it depends more on the individual recipient than on their industry. Here's how we read re-engagement after the first open.
Read post 6 min - EngineeringApril 19, 2026
Designing the webhook contract
The API and webhooks land with the Team plan. Here is how the webhook contract shaped the rest of the product.
Read post 5 min
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